Improvement in adjustable plow-jointers



aerea effi-fe,

JOHN MLLEONARD, 0F MARSHALL CITY, MICHIGAN.

Lettere Peteur Ne. 110,251, `aeree. Deeember 2o, 1870.

` IMPROVEMENT IN ADJUSTABLE PLO'W-JOINTERS.

The Schedule referred to these Letters Patent and making part of the same.

To whom it may conde/rn: l

-Be it known-that I, JOHN M. LEONARD, of Marshall City, in the county of Calhoun and State of Michigan, have invented a new and useful Improve ment in an Adjustable. Plow-Jointer; and MI do -decla-re that the following is a true and accurate description thereof, reference being had `to the accompanying drawing and to the letters of reference marked thereon and being a part of 'this specification, in whichyFigure Lis au elevation from the land-side of my jointer, and 4 Figure 2'i's a similar. view from the furrow side. Like letters indicate like parts in each ligure.

'lhc nature of this invention relates to the 4construction of an adjustable plowejointer in such a manner that the size of the furrow-slice taken by it may be varied to suit the plowman in the various soils; and, in like manner, the pitch of the jointer may be changed as circumstances may require.

The invention consists in providing a joint betweeuthe shank and mold-board of the jointer, and

'in providing the shank with an oblong slot, through which the bolt securing it to the standard passes, permitting the pitch of the shank to bc changed at will.

In the drawing- A represents the share or point, andrB the moldboard ofthe jointer, pivoted to the lower end of the The shank is secured to the lstandard by a screwinclined onthe standard.

The jointer shown-throws its slice in the opposite I direction to that taken by the plow, or, to be more explicit, turns it to land, when it is covered-in at the next turn.

In plowing in heavy, stili` soils, thefslice to .be taken by the jointer must necessarilybe less than in plowing stubble, to either of which it may be adjusted by means of the nut d', after being properly set.

As the point of the share becomes worn too much to be adjusted by altering the pitch of the standard in the clevis, the proper pitch may bc secured for the jointer by` adjusting` vthe shan-kL on the standard, through the bolt which attaches it thereto. l

Having thus described my invention,

.IVhat I claim as new, and desire to secure by Letters Patent, is

The combination, in an adjustable plow-jointcr, of the point A, the mold-board B, the-shank C, and the standard D, wherein the mold-board B is pivoted to the lower end of the shank C by the bolt a., and the shank C is provided with the slot c, and secured to the standard I) by the bolt (1 and the several parts named are constructed and arranged substantially as described and shown.

JOHN M. LEONARD.

Witncsscs:

M. STEWART, FREDERICK Enn'rs. 

